# Missing Angle: Supplementary Angles

Figure out the value of the missing angle using the fact that two angles are called supplementary when their measures add to 180 degrees.

Choose the correct answer

**Note:**Two angles are called supplementary when their measures add to 180 degrees.

**Example:**Angle DBA and angle ABC are supplementary angles. If angle ABC is 40°, what is angle DBA?

B

C

A

D

150°

140°

130°